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import testenv; testenv.configure_for_tests()
from sqlalchemy.orm import interfaces, util
from testlib import *
from testlib import fixtures
from sqlalchemy import Column
from sqlalchemy import Integer
from sqlalchemy import MetaData
from sqlalchemy import Table
from sqlalchemy.orm import aliased
from sqlalchemy.orm import mapper, create_session
from orm import _fixtures
from testlib.testing import eq_
class ExtensionCarrierTest(TestBase):
def test_basic(self):
carrier = util.ExtensionCarrier()
assert 'translate_row' not in carrier
assert carrier.translate_row() is interfaces.EXT_CONTINUE
assert 'translate_row' not in carrier
self.assertRaises(AttributeError, lambda: carrier.snickysnack)
class Partial(object):
def __init__(self, marker):
self.marker = marker
def translate_row(self, row):
return self.marker
carrier.append(Partial('end'))
assert 'translate_row' in carrier
assert carrier.translate_row(None) == 'end'
carrier.push(Partial('front'))
assert carrier.translate_row(None) == 'front'
assert 'populate_instance' not in carrier
carrier.append(interfaces.MapperExtension)
assert 'populate_instance' in carrier
assert carrier.interface
for m in carrier.interface:
assert getattr(interfaces.MapperExtension, m)
class AliasedClassTest(TestBase):
def point_map(self, cls):
table = Table('point', MetaData(),
Column('id', Integer(), primary_key=True),
Column('x', Integer),
Column('y', Integer))
mapper(cls, table)
return table
def test_simple(self):
class Point(object):
pass
table = self.point_map(Point)
alias = aliased(Point)
assert alias.id
assert alias.x
assert alias.y
assert Point.id.__clause_element__().table is table
assert alias.id.__clause_element__().table is not table
def test_notcallable(self):
class Point(object):
pass
table = self.point_map(Point)
alias = aliased(Point)
self.assertRaises(TypeError, alias)
def test_instancemethods(self):
class Point(object):
def zero(self):
self.x, self.y = 0, 0
table = self.point_map(Point)
alias = aliased(Point)
assert Point.zero
assert not getattr(alias, 'zero')
def test_classmethods(self):
class Point(object):
@classmethod
def max_x(cls):
return 100
table = self.point_map(Point)
alias = aliased(Point)
assert Point.max_x
assert alias.max_x
assert Point.max_x() == alias.max_x()
def test_simpleproperties(self):
class Point(object):
@property
def max_x(self):
return 100
table = self.point_map(Point)
alias = aliased(Point)
assert Point.max_x
assert Point.max_x != 100
assert alias.max_x
assert Point.max_x is alias.max_x
def test_descriptors(self):
class descriptor(object):
"""Tortured..."""
def __init__(self, fn):
self.fn = fn
def __get__(self, obj, owner):
if obj is not None:
return self.fn(obj, obj)
else:
return self
def method(self):
return 'method'
class Point(object):
center = (0, 0)
@descriptor
def thing(self, arg):
return arg.center
table = self.point_map(Point)
alias = aliased(Point)
assert Point.thing != (0, 0)
assert Point().thing == (0, 0)
assert Point.thing.method() == 'method'
assert alias.thing != (0, 0)
assert alias.thing.method() == 'method'
def test_hybrid_descriptors(self):
from sqlalchemy import Column # override testlib's override
import types
class MethodDescriptor(object):
def __init__(self, func):
self.func = func
def __get__(self, instance, owner):
if instance is None:
args = (self.func, owner, owner.__class__)
else:
args = (self.func, instance, owner)
return types.MethodType(*args)
class PropertyDescriptor(object):
def __init__(self, fget, fset, fdel):
self.fget = fget
self.fset = fset
self.fdel = fdel
def __get__(self, instance, owner):
if instance is None:
return self.fget(owner)
else:
return self.fget(instance)
def __set__(self, instance, value):
self.fset(instance, value)
def __delete__(self, instance):
self.fdel(instance)
hybrid = MethodDescriptor
def hybrid_property(fget, fset=None, fdel=None):
return PropertyDescriptor(fget, fset, fdel)
def assert_table(expr, table):
for child in expr.get_children():
if isinstance(child, Column):
assert child.table is table
class Point(object):
def __init__(self, x, y):
self.x, self.y = x, y
@hybrid
def left_of(self, other):
return self.x < other.x
double_x = hybrid_property(lambda self: self.x * 2)
table = self.point_map(Point)
alias = aliased(Point)
alias_table = alias.x.__clause_element__().table
assert table is not alias_table
p1 = Point(-10, -10)
p2 = Point(20, 20)
assert p1.left_of(p2)
assert p1.double_x == -20
assert_table(Point.double_x, table)
assert_table(alias.double_x, alias_table)
assert_table(Point.left_of(p2), table)
assert_table(alias.left_of(p2), alias_table)
class IdentityKeyTest(_fixtures.FixtureTest):
run_inserts = None
@testing.resolve_artifact_names
def test_identity_key_1(self):
mapper(User, users)
key = util.identity_key(User, 1)
eq_(key, (User, (1,)))
key = util.identity_key(User, ident=1)
eq_(key, (User, (1,)))
@testing.resolve_artifact_names
def test_identity_key_2(self):
mapper(User, users)
s = create_session()
u = User(name='u1')
s.add(u)
s.flush()
key = util.identity_key(instance=u)
eq_(key, (User, (u.id,)))
@testing.resolve_artifact_names
def test_identity_key_3(self):
mapper(User, users)
row = {users.c.id: 1, users.c.name: "Frank"}
key = util.identity_key(User, row=row)
eq_(key, (User, (1,)))
if __name__ == '__main__':
testenv.main()
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